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Annotation of lucent/sys/man/1/grep, revision 1.1

1.1     ! root        1: .TH GREP 1
        !             2: .SH NAME
        !             3: grep \- search a file for a pattern
        !             4: .SH SYNOPSIS
        !             5: .B grep
        !             6: [
        !             7: .I option ...
        !             8: ]
        !             9: .I pattern
        !            10: [
        !            11: .I file ...
        !            12: ]
        !            13: .SH DESCRIPTION
        !            14: .I Grep\^
        !            15: searches the input
        !            16: .I files\^
        !            17: (standard input default)
        !            18: for lines (with newlines excluded) that match the
        !            19: .IR pattern ,
        !            20: a regular expression as defined in
        !            21: .IR regexp (6).
        !            22: Normally, each line matching the pattern is `selected',
        !            23: and each selected line is copied to the standard output.
        !            24: The options are
        !            25: .TP
        !            26: .B -c
        !            27: Print only a count of matching lines.
        !            28: .PD 0
        !            29: .TP
        !            30: .B -h
        !            31: Do not print file name tags (headers) with output lines.
        !            32: .TP
        !            33: .B -i
        !            34: Ignore alphabetic case distinctions.  The implementation
        !            35: folds into lower case all letters in the pattern and input before
        !            36: interpretation.  Matched lines are printed in their original form.
        !            37: .TP
        !            38: .B -l
        !            39: (ell) Print the names of files with selected lines; don't print the lines.
        !            40: .TP
        !            41: .B -L
        !            42: Print the names of files with no selected lines;
        !            43: the converse of
        !            44: .BR -l .
        !            45: .TP
        !            46: .B -n
        !            47: Mark each printed line with its line number counted in its file.
        !            48: .TP
        !            49: .B -s
        !            50: Produce no output, but return status.
        !            51: .TP
        !            52: .B -v
        !            53: Reverse: print lines that do not match the pattern.
        !            54: .PD
        !            55: .PP
        !            56: Output lines are tagged by file name when there is more than one
        !            57: input file.
        !            58: (To force this tagging, include
        !            59: .B /dev/null
        !            60: as a file name argument.)
        !            61: .PP
        !            62: Care should be taken when
        !            63: using the shell metacharacters
        !            64: .B $*[^|()=\e
        !            65: and newline
        !            66: in
        !            67: .IR pattern ;
        !            68: it is safest to enclose the
        !            69: entire expression
        !            70: in single quotes
        !            71: .BR \&\|' \|.\|.\|.\| ' .
        !            72: .SH SOURCE
        !            73: .B /sys/src/cmd/grep.c
        !            74: .SH SEE ALSO
        !            75: .IR ed (1),
        !            76: .IR awk (1),
        !            77: .IR sed (1),
        !            78: .IR sam (1),
        !            79: .IR regexp (6)
        !            80: .SH DIAGNOSTICS
        !            81: Exit status is null if any lines are selected,
        !            82: or non-null when no lines are selected or an error occurs.

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